J,

I think you said it best....you'll be in griz country in washington...and alaska.....a .300 RUM or WBY with 200gr would be ok, but a .338RUM .340 WBY would be much better I think.

A muley at 400yds from a .338? might be big, maybe cause a tad more damage, but then again dead is dead, and overgunned n griz country vs undergunned?

Every sight states ballistics etc.....for comparisons, I think its helpful, but not the only thing to consider, but it will give you an idea....about some differences etc...

A .338 win mag will be your cheapest .338.....for ammo, and a rifle I suspect.....but a .338 RUM vs .340 wby ammo I would think would be close, and how many boxes do you really plan to buy? the .338 win mag might be nicer on the muleys......I just love the faster .338's, the RUM and WBY. I think if you compare the .300 win mag with 180 or 200gr, to a .338 with 200gr there isn't much difference. Something to think about.

I'm pulling for you to get a .340 wby or .338 RUM.